for Flussonic:
chmod +x Flussonic_23.01_Nulled.sh
./Flussonic_23.01_Nulled.sh

for Watcher:
chmod +x Watcher_23.01.01_Nulled.sh
./Watcher_23.01.01_Nulled.sh

Then choose your operating system
Then when prompted Choose Your desired port number And administrator username and password
It's that easy

https://flussonic.com/blog/changelog/version-23-01/